How to submit checkbox values with PHP post method

Question

<input type="checkbox" class='form' name="checkbox_1" />

<input type="checkbox" class='form' name="checkbox_2" />

<input type="checkbox" class='form' name="checkbox_3" />

.........

<input type="checkbox" class='form' name="checkbox_10" />

The from has been submitted using the "POST" method. identify, which of the check-boxes and write their numbers in increasing order. Separated all numbers by spaces(not new lines) and do not use any HTML formatting.

For Eg:

If check-boxes 3, 5 and 10 are checked.

Ouput would be:

3 5 10

Answer 1

Change the markup to something like

<input type="checkbox" class='form' value="1" name="checkbox[]" />
<input type="checkbox" class='form' value="2"  name="checkbox[]" />
<input type="checkbox" class='form' value="3"  name="checkbox[]" />

and to get the values submitted, use a simple loop

foreach($_POST['checkbox'] as $checkbox){
    echo $checkbox . ' ';
}

Answer 2

HTML Code ::

  <input type="checkbox" name="arrayValue[]"  value="value1" > value1 <br />
  <input type="checkbox" name="arrayValue[]"  value="value2" > value2 <br />
  <input type="checkbox" name="arrayValue[]"  value="value3" > value3 <br />
  <input type="checkbox" name="arrayValue[]"  value="value4" > value4 <br />

php code::

 $checkBoxValue = join(", ", $_POST['arrayValue']);  // here first (,) is user-define
                                                   // means, you can change it whatever
                                                // you want, even if it can be (space) or others

now you get the whole value of 'checkbox' in one variable